Keep the aquarium clean: The fish feeder rings keep the food in a certain area, it prevents the food from floating in unwanted places such as the filter, allowing more of it to be eaten. It is easier to clean up residual feed, reduce waste and maintain water quality, increasing more feeding fun. Prevents fish from being bullies: bulls can't shoot all the rings, so everyone has a chance to eat in peace. Fill a square feeder and let your most aggressive fish sink to eat. Once they are busy, add floating fish food in a second feeding square for more timid fish. Reasonable design: suction cup suspension, rotating device, floating design, when the water level rises or falls, rotating rod repositioning with the water level, floating rubber is embedded in the bottom, the fish feeder ring always keeps floating above the water. > Safe and quality material: the fish feeding ring made of  is made of high quality PVC, which is non-polluting and protects fish health. Floating rings can help fish develop a habit of eating in a fixed position. Wide application: the square feeding ring size is 10 x 10 cm, and the round one is 7. 5 x 7.5cm, suitable for various aquariums and aquariums. It is also suitable for fish, turtles, goldfish, cichlids, guppies, catfish, betta, aquatic animals, etc.Molain 2 Pack Fish Ring Feeder Aquarium Accessory turtle - For guppy, bettas, goldfish, turtle Features: Material: PVC rubber Color: blue. Product Dimensions: Square Ring: 10 x 10 cm Round ring: 7.5 x 7.5 cm Package dimensions: 15 x 14 x 1 cm Package weight: 24g / 0.84oz Contents: 2 fish feed rings.